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fiasKO [112]
3 years ago
8

2. What element could contain seven protons, eight neutrons, and seven electrons?

Chemistry
1 answer:
MAVERICK [17]3 years ago
8 0

Answer:

nitrogen i hope it helps

mark brain;est

Explanation:

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At this pressure, how many molecules of air would there be in a 20 ∘C experimental chamber with a volume of 0.020 m3 ?
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P= 4.0×10^-11Pa

V= 0.020m^3

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n=number of moles = m/A

Where m is the number of molecules and A is the Avogradro's number=6.02×10²³/mol

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PV= m/A(RT)

4.0×10^-11 ×0.020 = m/6.02×10²³(8.314×293)

m = 4.0×10^-11×0.020×6.02×10^23 / (8.314×293)

m = 1.98×10^8 molecules

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